Perbedaan nilai kekuatan tekan resin damar mata kucing (Shorea javanica) dengan resin damar batuThe difference in compressive strength value of mata kucing dammar resin (Shorea javanica) and batu dammar resin

Abstract

Introduction: Dammar resin is a non-timber forest product commodity that has high economic value and wide usability. Natural resins that are popular and abundant in Indonesia are mata kucing dammar resin and batu dammar resin. Resin widely used in dental materials such as composite resins, acrylic resins, varnishes, and dental waxes, but the resins used are artificial resins due to limited natural resin resources abroad. This study aims to analyze the difference in the compressive strength values between mata kucing dammar resin and batu dammar resin to use the resin as an alternative to dental materials. Methods: This research was quasi-experimental, compressive strength test on 16 samples of mata kucing dammar resin and 16 samples of batu dammar resin using a Universal Testing Machine with a crosshead speed of 1,0 ± 0,25 mm/minute until fracture occurs in the sample based on the ASTM D695 method. The value of the compressive strength of both dammar resins then analyzed using the Mann-Whitney test method using SPSS statistical software version 22. Results: The average compressive strength value of mata kucing dammar resin was 7,307±6,768 MPa, the average compressive strength value of batu dammar resin was 3,139±1,067 MPa. The p-value results obtained a value of 0.032. The p-value indicates a significant difference in the compressive strength value between the mata kucing dammar resin and the batu dammar resin. Conclusion: Mata kucing dammar resin has a higher compressive strength value, so it has greater potential for applying dental materials with low mechanical properties such as varnish.